| CCCoker Concrete | Dover | DE | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPColony Pool Service INC. | Wilmington | DE | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| CLColor-box LLC | Harrington | DE | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| CMContractors Materials LLC - Heald Street | Wilmington | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CCCorrado Construction CO LLC | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CPC & P Auto Body Svc | Elsmere | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| CUCpi (aka Unisource Worldwide) | New Castle | DE | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CTCraig Technologies | Seaford | DE | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CDCustom Decorative Mouldings | Greenwood | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| CICytec Industries INC. | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DIDash in 1410 - Penn & Union | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DADays Automotive | Newark | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DBD & B Products / Multi-tech, INC | Georgetown | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| DPDelaware Park Racetrack & Casino | Wilmington | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DSDelaware Storage and Pipeline Company | Dover | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| DSDelaware Support Operations | Dover | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DSDentsply Sirona | Milford | DE | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| DODover (city Of) Water Treatment Plant - 802 Long Point Rd, Dover | Dover | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| DRDow Reichhold Specialty Latex LLC (closed) | Dover | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DEDupont Electronic Materials Cmp, Llc-building 8 | Newark | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DHDupont Hay Road Sludge Drying Site | Wilmington | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| EMEdgemoor Materials INC | Wilmington | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| EPEdgewell Personal Care | Dover | DE | Paper Manufacturing322291 | — | ◇ UNVERIFIED |
| EPEdgewell Personal Care - Plant 4 | Dover | DE | Paper Manufacturing322291 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Christiana Lab | Wilmington | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Engineering Development Lab | Wilmington | DE | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Glasgow Site | Newark | DE | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Holly Run Plant | Newport | DE | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| EMEmpower Materials | Newark | DE | Plastics and Rubber Products Manufacturing326113 | — | ◇ UNVERIFIED |
| EMEssential Minerals LLC - Lambson Plant | New Castle | DE | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| ENEvelyn N Hyland Dds | Felton | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| EEExpert Engine Exchange INC | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| FDFamily Dollar #11978 | Newark | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| FMFarmington Materials, LLC | Greenwood | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| FSFirst State Construction INC. | Newark | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| FSFirst State Fleet Service | New Castle | DE | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| FIFp International INC | Newark | DE | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| GSGac Seaford INC | Seaford | DE | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| GEGalloway Electric CO INC | Newark | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| GEGe Energy (usa) LLC | Newark | DE | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| GSGreentree Spray Technologies LLC | Seaford | DE | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| HIHalosil International, INC. | New Castle | DE | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| HIHanesbrands INC | Dover | DE | Textile Mills313220 | — | ◇ UNVERIFIED |
| HCHardcore Composites | New Castle | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HDHardcore Dupont Composites | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| HCHarmony Cleaners | Newark | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| HTHarper Thiel | Wilmington | DE | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| HEHarrington Equipment - County Rd 225, Lincoln | Lincoln | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| HMHarris Manufacturing Co, INC - Dupont Blvd Closed | Smyrna | DE | Apparel Manufacturing315280 | — | ◇ UNVERIFIED |
| HMHarvey Mack Winnebago Ind | Bear | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
